OPAL
Contributed Abstracts for
ICHEP2000
Osaka
|
|
OPAL |
|
.Two kinds of OPAL documents are referenced here:
Final OPAL publications are identified by PRxxx. They may be quoted without reservation.
Preliminary OPAL results, in Physics Notes identified by PNxxx, may change before publication.
(Bracketed PR or PN numbers refer to earlier results, to be updated before the conference.)
Contact :
OPAL spokesman ,
OPAL Physics Coordinators.
| Collected Results - Latest versions, Including 2000 Data | ||||
| Abs. Nr |
Title | OPAL Doc. |
Parallel Session |
Plenary Session |
| 168 | Measurement of Standard Model Processes in e+e- Collisions at the Highest LEP Energies |
PN437
|
5 3 |
6a 11 |
| 169 | New Particle Searches in e+e- Collisions at the Highest LEP Energies |
PN435
|
11 | 7a |
| 177 | Search for Higgs Bosons in e+e- Collisions at the Highest LEP Energies |
PN450
|
11 | 7a |
| Collected Results - November 1999 versions | ||||
| Abs. Nr |
Title | OPAL Doc. |
Parallel Session |
Plenary Session |
| 184 | Measurement of Standard Model Processes in e+e- Collisions at 192-202 GeV | PN420 | 5 3 |
6a 11 |
| 185 | New Particle Searches in e+e- Collisions at 192-202 GeV | PN418 | 11 | 7a |
| 186 | Search for Higgs Bosons in e+e- Collisions at 192-202 GeV | PN421 | 11 | 7a |
| Electroweak at Z0 | ||||
| Abs. Nr |
Title | OPAL Doc. |
Parallel Session |
Plenary Session |
| 197 | Precision Luminosity for Z0 Lineshape Measurements with a Silicon-Tungsten Calorimeter | PR289 | 5 | 6a |
| 204 | A Precision Measurement of the Z0 Lineshape and Lepton Forward-backward Asymmetry |
PN442
|
5 | 6a |
| 205 | Precision Tau and Electron Neutral Current Asymmetry Meausurements from the Tau Polarization at OPAL |
PN438
|
5 7 |
6a 3 |
| 143 | A Measurement of R_b using a Double Tagging Method | PR257 | 5 7 |
6a 3 |
| 623 | A Measurement of R_c using a Multiple-Tagging Method | - | 5 7 |
6a 3 |
| Standard Model Processes at LEP2 | ||||
| Abs. Nr |
Title | OPAL Doc. |
Parallel Session |
Plenary Session |
| 149 | Tests of the Standard Model and Constraints on New Physics from Measurements of Fermion-pair Production at 189 GeV at LEP | PR286 | 5 | 6a |
| 150 | Tests of the Standard Model and Constraints on New Physics from Measurements of Fermion-pair Production at 192-202 GeV at LEP | PN424 | 5 | 6a |
| 151 | Multi-photon production in e+e- collisions at sqrt(s) = 189 GeV | PR283 | 5 | 6a |
| 215 | Multi-photon production in e+e- collisions at centre-of-mass energies up to 202 GeV at OPAL |
PN433
|
5 | 6a |
| 152 | Measurements of Rb, AFBb, and AFBc in e+e- Collisions at 130-189 GeV | PR297 | 5 | 6a |
| 153 | Z Boson Pair Production in e+e- Collisions at sqrt(s) = 183 and 189 GeV | PR300 | 5 | 6a |
| 154 | Z Boson Pair Production in e+e- Collisions at sqrt(s) above 190 GeV | (PN423) | 5 | 6a |
| 155 | Measurement of e gamma -> eZ/gamma* | PN392 | 5 | 6a |
| 216 | Search for anomalous Z Z gamma and Z gamma gamma couplings with the OPAL detector at LEP | PR311 | 5 11 |
6a 7a |
| 217 | Measurements of Ru, Rd and Rs in e+e- Collisions at 189-202 GeV | - | 5 | 6a |
|
577 578 |
Limits on Low-Scale Gravity from Measurements of ZZ and WW Production at LEP |
PN440
|
5 11 |
6a 7a |
| 218 | Measurements of neutral current four fermion events in e+e- collisions at LEP2 | (PN428) | 5 | 6a |
| 219 | Angular analysis of muon pair production around the Z peak | - | 5 | 6a |
| WW and TGC | ||||
| Abs. Nr |
Title | OPAL Doc. |
Parallel Session |
Plenary Session |
| 569 | WW Production and Decay at LEP |
PR321
|
5 | 6a |
| 146 | Measurement of the W Mass and Width in e+e- Collisions at 183 GeV | PR268 | 5 | 6a |
| 570 | Measurement of the Mass and Width of the W boson |
PN422
PR320
PN447
|
5 | 6a |
| 144 | W+W- production and triple gauge boson couplings at LEP energies up to 183 GeV | PR260 | 5 | 6a |
| 206 | Measurement of triple gauge boson couplings from W-pair production at LEP energies up to 202 GeV. |
(PN425)
PN441
|
5 | 6a |
| 148 | Measurement of Single W production and Triple Gauge Couplings in e+e- Collisions at centre-of-mass Energies up to 202 GeV | (PN427) | 5 | 6a |
| 207 | Measurement of the W boson polarisation and CP-violating triple gauge boson couplings from W+W- production at LEP | - | 5 | 6a |
| 208 | Measurement of triple gauge couplings using photonic events with missing energy at sqrt(s) = 189 GeV | - | 5 | 6a |
| 147 | Measurement of the W+W- gamma Cross-section and First Direct Limits on Anomalous Electroweak Quartic Gauge Couplings | PR292 | 5 | 6a |
| 572 | Measurement of the e+e- -> qq(bar)gamma gamma Cross Section and Limits on Anomalous Electoweak Quartic Gauge Couplings |
PN452
|
5 | 6a |
| 575 | Colour reconnection studies in WW events at LEP |
(PR267)
(PN412) (PN417) PN448
|
5 | 6a |
| 145 | Bose-Einstein Correlations in e+e- -> W+W- at 172 and 183 GeV | PR262 | 5 | 6a |
| 576 | A Study of Bose-Einstein Correlations in hadronic W Decays | (PN393) | 5 | 6a |
| 214 | Charm production in hadronic W decays at LEP |
(PN402)
PR322
|
5 | 6a |
| Higgs | ||||
| Abs. Nr |
Title | OPAL Doc. |
Parallel Session |
Plenary Session |
| 156 | Search for Neutral Higgs Bosons in e+e- Collisions at sqrt(s) ~ 189 GeV | PR285 | 11 | 7a |
| 157 | Search for Higgs Boson and Other Massive States Decaying into Two Photons in e+e- Collisions at 189 GeV | PR281 | 11 | 7a |
| 158 | Search for Higgs Bosons in e+e- Collisions at 183 GeV | PR261 | 11 | 7a |
| 220 | Search for Neutral Higgs Bosons in e+e- Collisions at 192-202 GeV | PN426 | 11 | 7a |
| 222 | Search for Neutral Higgs Bosons in Two Higgs Field Doublets Models |
PR318
|
11 | 7a |
| 223 | Searches for the Model I Charged Higgs with OPAL Detector at LEP |
PN445
|
11 | 7a |
| 224 | Search for Charged Higgs Bosons in e+e- Collisions at sqrt{s} up to 202 GeV |
PN432
|
11 | 7a |
| 225 | Search for Higgs Bosons Decaying into Photons in e+e- Collisions at sqrt{s} up to 202 GeV |
PN450
|
11 | 7a |
| 226 | Search for Invisibly Decaying Higgs Bosons |
(PN399)
PN450
|
11 | 7a |
| 227 | A Flavour Independent Search for the Higgsstrahlung Process in e+e- Collisions |
PN419
PN449
|
11 | 7a |
| 228 | Search for Yukawa Production of a Light Neutral Higgs Boson at LEP I | - | 11 | 7a |
| Searches | ||||
| Abs. Nr |
Title | OPAL Doc. |
Parallel Session |
Plenary Session |
| 198 | Search for Chargino and neutralino Production at sqrt(s)=181-184 GeV at LEP | PR256 | 11 | 7a |
| 120 | Search for Chargino and neutralino Production at sqrt(s)=189 GeV at LEP | PR291 | 11 | 7a |
| 229 | Search for Chargino and neutralino Production at sqrt(s)=192-202 GeV at LEP | PN418 | 11 | 7a |
| 121 | Search for Scalar Top and Scalar Bottom Quarks at ECM=189GeV at LEP | PR274 | 11 | 7a |
| 122 | Searches for R--Parity Violating Decays of Scalar Fermions at LEP | PR275 | 11 | 7a |
| 123 | Searches for R--Parity Violating Decays of Gauginos at 183 GeV at LEP | PR269 | 11 | 7a |
| 124 | Searches for R--Parity Violating Decays of Sfermions and Gauginos via lambda prime and lambda double prime Couplings at sqrt{s} = 189 GeV at LEP | PN411 | 11 | 7a |
| 125 | Searches for R-Parity Violating decays of Supersymmetric Particles with lambda Couplings at 189 GeV at LEP | PN394 | 11 | 7a |
| 231 | Searches for R-Parity Violating decays of Supersymmetric Particles with sqrt(s) = 189 GeV at LEP |
PN411
PN394 |
11 | 7a |
| 232 | Searches for R-Parity Violating decays of Supersymmetric Particles with sqrt(s) up to 202 GeV at LEP | PN418 | 11 | 7a |
| 233 | Searches for Prompt Light Gravitino Signatures in e+e- Collisions at sqrt(s) = 189 GeV | PR309 | 11 | 7a |
| 234 | Searches for Light Gravitino Signatures with Measurable Lifetime in e+e- Collisions at sqrt(s) = 189 - 202 GeV | - | 11 | 7a |
| 126 | Searches for Light Gravitino Signatures in e+e- Collisions at sqrt(s) = 189 GeV | PN397 | 11 | 7a |
| 235 | Search for nearly mass degenerate Charginos and Neutralinos | - | 11 | 7a |
| 127 | Search for Unstable Heavy and Excited Leptons at LEP2 | PR298 | 11 | 7a |
| 236 | Searches for Charged Excited Leptons with photonic decays in e+e- collisions at root(s) = 189-202 GeV |
PN434
|
11 | 7a |
| 128 | Search for pair-produced Leptoquarks in e+e- collisions at sqrt(s) = 183 GeV | PR287 | 11 | 7a |
| 237 | Search for pair-produced Leptoquarks in e+e- collisions at sqrt(s) = 189 - 202 GeV |
PN439
|
11 | 7a |
| 238 | Search for the Singly Produced leptoquarks in e+e- Collisions at sqrt(s) = 189 GeV |
PN451
|
11 | 7a |
| 199 | Search for Anomalous Photonic Events with Missing Energy in e+e- Collisions at sqrt(s) = 130, 136 and 183 GeV | PR258 | 11 | 7a |
| 159 | Photonic Events with Missing Energy in e+e- Collisions at sqrt(s) = 189 GeV | PR306 | 11 | 7a |
| 239 | Photonic Events with Missing Energy in e+e- Collisions at sqrt(s) = 192-206 GeV |
PN435
|
11 | 7a |
| 160 | Search for Anomalous Production of Acoplanar Di-lepton Events in e+e- collisions at sqrt(s) = 183 and 189 GeV | PR290 | 11 | 7a |
| 240 | Leptonic Events with Missing Energy in e+e- Collisions at sqrt(s) = 183-202 GeV |
(PN418)
PN435 |
11 | 7a |
| 200 | Search for Stable and Long-Lived Massive Charged Particles in e+e- Collisions at sqrt(s)=130-189 GeV | PN395 | 11 | 7a |
| 241 | Search for Stable and Long-Lived Massive Charged Particles in e+e- Collisions at sqrt(s)=130-202 GeV | PN418 | 11 | 7a |
| 202 | Search for Baryon and Lepton Number Violating Z0 Decays | PR263 | 11 | 7a |
| 242 | Search for Single Top-Quark Production in e+e- Collisions with root(s) = 189 GeV at LEP |
(PN429)
PN444
|
11 | 7a |
| 243 | Search for Single Top-Quark Production in e+e- Collisions with root(s) = 189 - 204 GeV at LEP | - | 11 | 7a |
| 244 | Search for doubly charged Higgs particles with the OPAL detector |
PN446
|
11 | 7a |
| 620 | Indirect Limits on New Physics from Precision Measurements of Standard Model processes at LEP2 |
(PR286)
(PN424) |
11 | 7a |
| 672 | Search for Anomalous Production of llqq Events in e+e- Collisions at LEP2 | PN428 | 11 | 7a |
| TAU | ||||
| Abs. Nr |
Title | OPAL Doc. |
Parallel Session |
Plenary Session |
| 118 | A Study of Three-Prong Tau Decays with Charged Kaons | PR288 | 7 | 3 |
| 119 | Tau decays with Neutral Kaons | PR293 | 7 | 3 |
|
246 272 |
Ameasurement of the Tau Mass and a First Test of CPT with Tau Leptons | PR308 | 7 11 |
3 7a |
| 579 | A Study of One-Prong Tau Decays with a Charged Kaon |
PR315
|
7 | 3 |
| Heavy flavour, light flavour | ||||
| Abs. Nr |
Title | OPAL Doc. |
Parallel Session |
Plenary Session |
| 89 | Measurement of the Semileptonic Branching Ratio of Charm Hadrons produced in Z0->cc Decays | PR259 | 7 | 3 |
| 90 | A Measurement of the Product Branching Ratio f(b->Lambdab).BR(Lambdab->LambdaX) in Z0 Decays | PR265 | 7 | 3 |
| 92 | Measurement of the B+ and B0 Lifetimes and Search for CP(T) Violation using Reconstructed Secondary Vertices | PR266 | 7 | 3 |
| 93 | Measurements of inclusive semileptonic branching fractions of b hadrons in Z0 decays | PR279 | 7 | 3 |
| 94 | A Study of Bs0 Meson Oscillation Using Hadronic Z0 Decays Containing Leptons | PR282 | 7 | 3 |
| 95 | Measurement of the Production Rate of Charm Quark Pairs from Gluons in Hadronic Z0 Decays | PR284 | 7 | 3 |
| 96 | Search for New Physics in Rare B Decays | PR301 | 7 11 |
3 7a |
| 88 | Measurement of |Vcb| using B0 -> D*+l-v decays | PR305 | 7 | 3 |
| 98 | Measurement of the production rate of bb(bar) quark pairs from gluons and bb(bar)bb(bar) events in hadronic Z0 decays |
PR313
|
7 | 3 |
| 99 | Investigation of the Decay of Orbitally-Excited B Mesons and First Measurement of the Branching Ratio BR ( B*_J --> B* pi ) | PN400 | 1 | 3 |
| 580 | First Measurement of BR(b -> phi) at the Z0 | PR310 | 7 | 3 |
| 247 | A Study of Charm Hadron Production in Z0 -> cc(bar) and Z0 -> bb(bar) decays at LEP | - | 7 | 3 |
| 248 | A study of Bs0 Meson Oscillations using Ds-Lepton Events | - | 7 | 3 |
| 624 | Measurement of the B0 lifetime and oscillation frequency using B0->D*lv decays |
PR317
|
7 | 3 |
| Inclusive Hadron Production | ||||
| Abs. Nr |
Title | OPAL Doc. |
Parallel Session |
Plenary Session |
| 100 | A study of spin alignment of rho(770)+/- and omega(782) mesons in hadronic Z0 decays | PR280 | 2 | 12 |
| 101 | Bose-Einstein Correlations in K+/-K+/- pairs from Z0 decays into two hadronic jets | PR295 | 2 | 12 |
| 103 | Leading particle production in light flavour jets | PR296 | 3 | 11 |
| 104 | Transverse and longitudinal Bose-Einstein correlations in hadronic Z0 decay | PR302 | 2 | 12 |
| 105 | Charged multiplicities in Z decays into u, d and s quarks | PN396 | 3 | 11 |
| QCD | ||||
| Abs. Nr |
Title | OPAL Doc. |
Parallel Session |
Plenary Session |
| 113 | QCD studies with e+e- annihilation data at 172-189 GeV | PR303 | 3 | 11 |
| 114 | QCD Analyses and Determinations of the Strong Coupling Strength in e+e- Annihilations at Energies between 35 and 189 GeV | PR299 | 3 | 11 |
| 115 | Test of the Flavour Independence of alpha_s using Next-to-leading Order Calculations for Heavy Quarks | PR276 | 3 | 11 |
| 116 | Experimental Properties of Gluon and Quark Jets from a Point Source | PR273 | 3 | 11 |
| 117 | Intermittency and Correlations in Hadronic Z0 Decays | PR270 | 2 | 12 |
| 250 | pi0, eta, K0 and charged particle multiplicities in quark and gluon jets | PR312 | 3 | 11 |
| 251 | A simultaneous measurement of the strong coupling strength and the QCD colour charges | PN430 | 3 | 11 |
| 252 | QCD studies with e+e- annihilation data at the highest LEP-2 energies | (PN420) | 3 | 11 |
| Two Photon Interactions | ||||
| Abs. Nr |
Title | OPAL Doc. |
Parallel Session |
Plenary Session |
| 109 | Inclusive Production of charged D* Mesons in Photon-Photon Collisions at e+e- centre-of-mass energies of 183 and 189 GeV | PR294 | 2 | 12 |
| 110 | First Measurement of the Charm Structure Function of the Photon in Deep Inelastic Electron-Photon Scattering at LEP | PR294 | 2 | 12 |
| 616 | Inclusive Production of D* Mesons in Photon-Photon Collisions at sqrt(s)_ee=183 and 189 GeV and a First Measurement of F2^gamma_c | PR294 | 3 | 11 |
| 253 | Measurement of the Gamma^* Gamma^* Cross Section using Double Tag Events | - | 2 | 12 |
| 254 | Measurement of the Low-x Behaviour of the Photon Structure Function |
PR314
|
2 | 12 |
| 111 | Total Hadronic Cross-Section of Photon-Photon Interactions at LEP | PR278 | 2 | 12 |
| 112 | The QED structure of the photon | PR271 | 2 | 12 |
|
255 583 |
The Q^2 Dependence of the Di-Jet Cross Section in Photon-Photon Collisions at LEP |
PN443
|
3 2 |
11 12 |
|
256 606 |
Measurement of the virtual photon structure function in Photon-Photon Collisions at LEP | - | 3 2 |
11 12 |
| 1055 | Beauty particle production in photon-photon scattering at LEP2 | - | 2 | 12 |
Tatsuo Kawamoto, 4.May 2000